At what price?

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In Kachin State, mercury is currently the reagent most commonly used for gold
extraction, but sometimes cyanide is also used. ... In 2002 a Wildlife Conservation
Society survey counted 245 manual sluice and gold panning operations along
the Irrawaddy between Myitkyina and Bhamo ... The most common engines on
the dredges are 25 horsepower motors made by a Chinese company called
linma.